[OpenAFS] linking afs.ext.64 on AIX fails with missing symbol
vprintf
Jeffrey E Altman
jaltman@auristor.com
Sat, 13 Aug 2022 05:23:44 -0400
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On 8/13/2022 1:57 AM, Ben Huntsman (ben@huntsmans.net) wrote:
> After a few tweaks to some of the source files (which I will submit
> later), I have all the code for afs.ext.64 compiling, but it fails to
> link due to a missing symbol .vprintf. The AIX man pages show that
> this is included in /lib/libc.a, and nm confirms it.
>
libc is a userspace library. The failure is when linking the kernel
module and there is no vprintf in the kernel.
> The reference is from src/rx/rx_kcommon.c:
>
> void
> osi_Msg(const char *fmt, ...)
> {
> va_list ap;
> va_start(ap, fmt);
> #if defined(AFS_LINUX_ENV)
> vprintk(fmt, ap);
> #else
> vprintf(fmt, ap);
> #endif
> va_end(ap);
> }
>
>
> Just as another sloppy fix I tried several variants of print functions
> that could substitute on AIX, but they all fail with a missing
> symbol. How did this work on AIX in the past?
>
The vprintf usage in kernel on AIX was introduced by
https://gerrit.openafs.org/14791
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<div class="moz-cite-prefix">On 8/13/2022 1:57 AM, Ben Huntsman
(<a class="moz-txt-link-abbreviated" href="mailto:ben@huntsmans.net">ben@huntsmans.net</a>) wrote:<br>
</div>
<blockquote type="cite"
cite="mid:MWHPR0701MB3674039C4659C58B11EF9213A7669@MWHPR0701MB3674.namprd07.prod.outlook.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<style type="text/css" style="display:none;">P {margin-top:0;margin-bottom:0;}</style>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
After a few tweaks to some of the source files (which I will
submit later), I have all the code for afs.ext.64 compiling, but
it fails to link due to a missing symbol .vprintf. The AIX man
pages show that this is included in /lib/libc.a, and nm confirms
it. </div>
<br>
</blockquote>
<p>libc is a userspace library. The failure is when linking the
kernel module and there is no vprintf in the kernel.</p>
<p><br>
</p>
<blockquote type="cite"
cite="mid:MWHPR0701MB3674039C4659C58B11EF9213A7669@MWHPR0701MB3674.namprd07.prod.outlook.com">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
The reference is from src/rx/rx_kcommon.c:</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
void
<div>osi_Msg(const char *fmt, ...)</div>
<div>{</div>
<div> va_list ap;</div>
<div> va_start(ap, fmt);</div>
<div>#if defined(AFS_LINUX_ENV)</div>
<div> vprintk(fmt, ap);</div>
<div>#else</div>
<div> vprintf(fmt, ap);</div>
<div>#endif</div>
<div> va_end(ap);</div>
<div>}</div>
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Just as another sloppy fix I tried several variants of print
functions that could substitute on AIX, but they all fail with a
missing symbol. How did this work on AIX in the past?</div>
<br>
</blockquote>
<p>The vprintf usage in kernel on AIX was introduced by <br>
</p>
<p><br>
</p>
<p> <a class="moz-txt-link-freetext" href="https://gerrit.openafs.org/14791">https://gerrit.openafs.org/14791</a></p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
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